The possibility to determine the pΛ scattering length from the final-state interaction in the reaction is investigated experimentally. From a transversely polarized measurement, the K+ analyzing power (AN) which, in principle, allows one to extract the spin triplet scattering length is studied. An unexpected energy dependence of the forward/backward symmetric part of AN is found. The influence of N* resonances on the pΛ invariant mass spectrum is investigated by exploiting the large acceptance for the process and is found to be the main source of uncertainty for determining the pΛ scattering length.